DAFIF
DAFIF (Digital Aeronautical Flight Information File) is a comprehensive database of up- to-date aeronautical data, including information on airports , airways, airspaces , navigation data and other flight-related facts around the world, maintained by the United States' National Geospatial-Intelligence Agency (NGA) States .
DAFIF was publicly accessible on the Internet until October 2006 , but was blocked from public access. Providers of foreign sources claim intellectual property rights . Currently, only federal and state government agencies, authorized government companies, and Department of Defense customers can access the DAFIF data.